age = 3
if age >= 18:
    print('your age is ', age)
    print('adult')
elif age >= 6:
    print('teenager')
else:
    print('kid')

x = '1'
if x:
    print('True')

s = input('birth:')
birth = int(s)
if birth >= 2000:
    print('00后')
else:
    print('00前')

height = 1.75
weight = 50.5
bmi = weight / (height * height)
print(bmi)
if bmi > 32:
    print('严重肥胖')
elif 32 > bmi > 28:
    print('肥胖')
elif 28 > bmi > 25:
    print('过重')
elif 25 > bmi > 18.5:
    print('正常')
elif bmi < 18.5:
    print('过轻')
